Intelligent measurement and control injection pipe column with expansion, intelligent measurement and control device thereof and use method thereof

Abstract

This invention discloses an expansion-type intelligent monitoring and control injection string, its intelligent monitoring and control device, and its usage method. It includes an injection tubing, and further includes an intelligent monitoring and control device, a cable-connected expansion packer, and a constant-pressure sand-washing valve mounted on the injection tubing. The constant-pressure sand-washing valve is located at the lower end of the injection tubing. At least two intelligent monitoring and control devices are installed above the constant-pressure sand-washing valve, each corresponding to one injection layer. A cable-connected expansion packer is installed between every two intelligent monitoring and control devices. This invention meets the requirements for automatic monitoring and control of injection wells, with no limit on the number of injection layers. It monitors and collects formation data in real time, enabling automatic measurement and adjustment of each layer without the need for additional instruments. It achieves stratified flow metering, meeting the requirements for stratified water distribution.

Description

Technical Field

[0001] This invention relates to the field of water injection technology for oilfield injection wells, specifically to an expansion-type intelligent measurement and control injection string, its intelligent measurement and control device, and its usage method. Background Technology

[0002] There are two methods of water injection in oilfields: general water injection and stratified water injection. General water injection involves injecting water into all layers of the well without isolation, under the same pressure. Stratified water injection involves installing packers in the injection well to separate the oil layers, with a water distributor installed for each layer. Stratified water injection wells mainly use integrated measurement and control and conventional drop-and-retrieve measurement and control processes. The workload for on-site measurement and control and sealing verification is large, resulting in a significant waste of manpower and equipment resources. With the increasing complexity of injection well conditions and factors such as corrosion and scaling of the injection tubing, the workload and cost of measurement and control will further increase. Measurement and control equipment and testing teams face multiple challenges, including heavy workloads and high intensity.

[0003] Cable-guided intelligent water injection transmits downhole production status parameters to the surface in real time via cable. After surface data processing and analysis, the surface control system issues commands to adjust the intelligent water distributor to achieve water injection at each level.

[0004] The purpose of this invention is to provide a stratified water injection process that enables ground-based control of water distribution at each well level via cable. This process allows control of the on / off state of the water nozzles at each level, enabling the testing of water volume at each level and the acquisition of injection parameters for each level.

[0005] Publication No. CN115680587A discloses an intelligent stratified injection string for water-polymer injection wells, belonging to the field of oilfield production enhancement and injection technology. The stratified injection string includes a downhole double-layer tubing, a downhole safety valve, a top packer, a cable positioning seal, a dual-medium injection working tube, an isolation packer, a cable insertion seal, and a plug. The dual-medium injection working tube is connected to a surface controller via a steel-armored cable. The operation method is as follows: well cleaning; normal commissioning and testing of the dual-medium injection working tube; installation of the string and steel-armored cable; string seal verification; injection of different media according to reservoir requirements; and targeted acidizing. This prior art can achieve online stepless control of stratified dual-medium injection in wells of any deflection, and can also implement targeted acidizing according to reservoir requirements. This prior art can achieve simultaneous stratified injection of water and polymer in multiple sections within the same well, with online stepless control of the injection, and can also implement targeted acidizing according to production requirements, solving many problems associated with previous water-polymer surface injection strings.

[0006] The existing technology has the problems of not being able to backwash and prevent sand, and the real-time layered injection data is incomplete.

[0007] Publication No. CN109025926B discloses a centralized control intelligent stratified water injection string and control system. The string includes a wellhead acoustic communication device, a cable-connected integrated intelligent water distribution packer connected in series from top to bottom along the injection tubing via cables and cable connectors, a cable packer, a cable-connected individual intelligent water distributor, an intelligent control system, and the downhole acoustic communication device. The wellhead and downhole acoustic communication devices establish a downhole-to-surface wireless communication system. An integrated control module provides unified control of flow monitoring and regulation, and pressure monitoring. The intelligent control system optimizes the control sequence. The cable-connected integrated intelligent water distribution packer integrates the functions of two intelligent water distributors and one packer. This prior art solves the problem of wireless bidirectional transmission of downhole data in existing intelligent injection strings, realizes data sharing between downhole intelligent water distribution devices, improves allocation efficiency, simplifies the structure of existing intelligent injection strings, and improves the intelligence level of injection wells.

[0008] The existing technology has the problems of not being able to backwash and prevent sand, and the real-time layered injection data is incomplete.

[0009] Publication (Announcement) No.: CN113818850A discloses a real-time monitoring cabled intelligent injection system and its usage method, including an injection wellhead. A cable anti-pressure mechanism is installed on the outer side of the injection wellhead. A hanger is fixedly connected to the bottom of the injection wellhead. A riser section is fixedly connected to the outer side of the hanger. A tubing string is fixedly connected to the bottom of the riser section. A depth adjustment section is fixedly connected to the outer side of the tubing string and below the riser section. This prior art has a compact structure, is simple and convenient to operate, and is highly practical. By installing a proximity alarm and a monitoring camera at the bottom of the well and connecting them to the ground control cabinet and the central control computer, the system can monitor and control the situation at the bottom of the well in real time. Furthermore, by installing a cable anti-pressure mechanism at the injection wellhead, the signal cable is prevented from being damaged or even broken by the hanger when the cabled intelligent injection system is running tubing, thus greatly reducing maintenance time and saving costs, which is beneficial for practical applications.

[0010] The existing technology has the problems of not being able to backwash and prevent sand, and the real-time layered injection data is incomplete.

[0011] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding the more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0012] To address the aforementioned deficiencies in existing technologies, the purpose of this invention is to provide an expandable intelligent measurement and control injection string, its intelligent measurement and control device, and its usage method, which meets the requirements for automatic measurement and control injection in water injection wells, with no limit on the number of injection layers; real-time monitoring and acquisition of formation data; automatic measurement and adjustment of each layer without the need for additional instruments; and stratified flow rate measurement to meet the requirements for stratified water distribution.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] Expandable intelligent measurement and control injection tubing string and its intelligent measurement and control device and its usage method, including water injection tubing, and also including intelligent measurement and control device, cable expansion packer and constant pressure sand washing valve installed on water injection tubing;

[0015] The constant pressure sand washing valve is located at the lower end of the water injection oil pipe;

[0016] At least two intelligent monitoring and control devices are installed above the constant pressure sand washing valve, with each intelligent monitoring and control device corresponding to a water injection layer; a cable expansion packer is installed between every two intelligent monitoring and control devices.

[0017] The intelligent measurement and control device includes a first upper connector, a central tube, a measurement and control integrated short section, an outer protective sleeve, a water outlet fixing ring, a water outlet adjusting ring, an anti-reverse spring, a spring adjusting ring, a fastening ring, and a first lower connector;

[0018] Using the test integrated short section as a reference, the central tube is inserted into the upper end face of the test integrated short section, the outer protective sleeve is connected to the upper outer wall of the test integrated short section by threads, and the upper connector is inserted into the central tube.

[0019] The lower end of the test integrated short section is connected to the outlet fixing ring by a thread. The outlet adjusting ring and the anti-reverse spring are sequentially inserted from the lower end of the test integrated short section. The spring adjusting ring is connected to the lower end of the test integrated short section by a thread to press the anti-reverse spring tight.

[0020] The lower end of the first upper connector is connected to the upper end of the central tube, and the upper end of the outer protective sleeve is provided with a union adjusting ring to fasten the first upper connector;

[0021] The first lower connector is inserted into the lower end of the test integrated short section, and the fastening ring passes through the lower end of the lower connector and is connected to the test integrated short section through threads to press the lower connector tight.

[0022] The measurement and control integrated short section is provided with an axial flow test channel and a first mounting countersunk hole; a post-hole pressure test module is provided at the upper end of the flow test channel, a shoulder is provided at the bottom of the first mounting countersunk hole, and a rotary electric drive control short section is provided on the shoulder;

[0023] The flow test channel is connected to the inner cavity of the measurement and control integrated short section through a diversion hole. The side wall of the flow test channel is provided with a flow test outlet hole that communicates with the first mounting countersunk hole. The first mounting countersunk hole is provided with a water outlet, which is blocked by a water outlet regulating ring. The rotary electric drive control short section controls the connection between the flow test outlet hole and the water outlet.

[0024] The rotary electric drive control section includes a rotary regulating valve and a drive mechanism;

[0025] The rotary regulating valve includes a fixed regulating valve, a movable valve disc adjusting shaft, a regulating valve spring, and a regulating valve sealing section. The upper end of the fixed regulating valve is closed, and the upper end of the regulating valve sealing section is connected to the lower end of the fixed regulating valve. The front end of the movable valve disc adjusting shaft is inserted into the central countersunk hole of the fixed regulating valve, and the rear end is inserted into or passes through the central hole of the regulating valve sealing section. A valve disc is provided on the movable valve disc adjusting shaft, and the regulating valve spring is provided between the valve disc and the regulating valve sealing section. The upper end face of the valve disc is in contact with the inner end face of the fixed regulating valve.

[0026] The upper end of the regulating fixed valve is provided with a through fixed waist-shaped hole, the valve plate of the moving valve plate adjusting shaft is provided with a moving waist-shaped hole, and the valve wall of the regulating fixed valve is provided with a water inlet groove.

[0027] The lower end of the moving valve plate adjusting shaft is connected to the output shaft of the drive mechanism, and the upper end of the drive mechanism is connected to the lower end of the regulating valve sealing section.

[0028] The upper end face of the integrated measurement and control section is also threadedly connected to an external pressure testing module, a rotary electric drive control section, a hole pressure testing module, an internal pressure testing module, and a temperature testing module; it also includes a control circuit module installed by plugging in.

[0029] The tail wires of all test modules are connected to the control circuit module; the external cables of the control circuit are aggregated into a downhole signal cable.

[0030] An orifice plate is provided in the flow test channel, and an orifice plate pressure ring is provided above the orifice plate, which presses the orifice plate tightly onto the step inside the flow test channel.

[0031] The measurement and control integrated short section has an internal pressure transmission hole and an external pressure transmission hole on its wall; the internal pressure transmission hole connects the internal pressure test module to the inside of the measurement and control integrated short section, and the external pressure transmission hole connects the external pressure test module to the outside of the measurement and control integrated short section.

[0032] The drive mechanism includes a motor connector, a thrust drive shaft, a motor adapter, a geared motor, a protective sleeve, and an end cap.

[0033] The upper end of the motor connector is connected to the lower end of the regulating valve sealing section; the inner wall of the lower end of the motor connector is threaded to the motor adapter; the outer wall of the lower end is threaded to the protective sleeve; and the lower end of the protective sleeve is threaded to the end cap.

[0034] The geared motor is installed at the lower end of the motor adapter and is fixed with screws;

[0035] The lower end of the moving valve plate adjusting shaft is connected to the upper end of the thrust drive shaft via a first coupling. The moving valve plate adjusting shaft and the thrust drive shaft pass through the regulating valve sealing section and the motor connector in sequence. The lower end of the thrust drive shaft is connected to the output shaft of the geared motor via a second coupling. The tail wire of the geared motor passes through the end cap and is connected to the control circuit module. Under the control of the control circuit module, the geared motor drives the thrust drive shaft and the moving valve plate adjusting shaft to rotate.

[0036] It also includes a wire guide module, which includes an external pin sealing head, a lead wire hole, and an internal pin sealing module;

[0037] The outer pin sealing head is installed on the upper end of the lead hole by a threaded connection, and the inner pin sealing module is installed on the lower end of the lead hole by a plug-in connection and fixed with screws;

[0038] The cable passing module is installed on the first upper connector, the first lower connector, and the integrated measurement and control short section, enabling the signal cable to pass through the intelligent measurement and control device.

[0039] It also includes a water injection wellhead that can cross the cable, a flow controller, a ground control cabinet, and a remote measurement and control service terminal;

[0040] The upper end of the water injection pipe is connected to the water injection wellhead of the cable that can pass through it, the flow controller is connected to the measurement port of the water injection wellhead of the cable that can pass through it, the ground control cabinet is set up at the well site, and the remote transmission measurement and control service terminal is connected to the ground control cabinet through the network.

[0041] A cable connector and a cable protector are installed between the topmost intelligent monitoring and control device and the water injection wellhead that can pass through the cable. The surface signal cable of the ground control cabinet passes through the water injection wellhead that can pass through the cable and is connected to the upper end of the cable connector via the cable protector. The lower end of the cable connector is equipped with a downhole signal cable.

[0042] The lower end of the water injection tubing is equipped with a constant pressure sand washing valve, and the lower end of the constant pressure sand washing valve is equipped with a sand washing tail pipe, with a plug at the bottom of the sand washing tail pipe.

[0043] The constant pressure sand washing valve includes a second upper connector, an outer pipe, a sand control valve, a connecting short section, a fluid distributor, and a second lower connector.

[0044] The second upper connector, outer tube, distributor, and second lower connector are sequentially connected by threads; wherein the lower end of the outer tube is connected to the outer wall of the upper end of the distributor, and the upper end of the second lower connector is connected to the outer wall of the lower end of the distributor.

[0045] The upper center of the fluid divider is provided with a second countersink, and the side wall of the countersink is provided with an oil washing well water inlet to connect the second countersink to the outside. An axial sand settling channel is provided on the wall of the fluid divider hole.

[0046] The connecting section is connected to the upper end of the second countersunk hole, and the sand valve is located at the upper end of the connecting section.

[0047] The sand control valve includes a flow guide ball cover, a large spring, a valve ball, a valve seat, a valve seat sleeve, a ball retainer cover, and a small spring.

[0048] The flow guide ball cover is threadedly connected to the valve seat sleeve. The upper end of the flow guide ball cover is connected to the outer cone spring seat. A large spring, a first valve ball, and a first valve seat are sequentially arranged below the outer cone spring seat.

[0049] The valve seat sleeve is provided with a step, and a ball retainer, a small spring, a valve ball, and a second valve seat are provided under the step;

[0050] The lower end of the valve seat sleeve is connected to the upper end of the connecting short section;

[0051] The ball-blocking cover is provided with through holes or the ball-blocking cover is a spoked structure.

[0052] The method for using the expandable intelligent monitoring and control injection string includes the following steps:

[0053] S1. Tool Connection, Download Tool String

[0054] The tools are connected sequentially through the water injection tubing. The distance between the tools is adjusted by the number of tubings so that the cable expansion packer is positioned near the partition between the two water injection layers. The intelligent monitoring and control device is positioned on each water injection layer. The signal cable is connected to the intelligent monitoring and control device sequentially and passes through the cable expansion packer. Each tubing uses a cable protector to fix the signal cable to the outer wall of the tubing. The water injection tubing is suspended at the water injection wellhead that can be crossed by the cable. The cable exits from the wellhead and connects to the surface control cabinet.

[0055] S 2, Trial injection sealing

[0056] The remote transmission and control service terminal controls the intelligent monitoring and control devices on each layer to turn on the water tap switch, and water injection begins on the ground. The incoming water enters the intelligent monitoring and control device through the water injection oil pipe. The rotary electric drive adjustment section adjusts the water volume and then flows out from the outlet. At this time, the spring force of the anti-reverse spring must be overcome to push open the water outlet adjustment ring before it can be injected into the formation. This water injection process will generate a throttling pressure difference between the inside and outside of the water injection oil pipe. The internal pressure is greater than the external pressure. Under the action of the throttling pressure difference, the rubber sleeve of the cable expansion packer automatically expands to complete the setting and seal, separating the water injection layer section.

[0057] S 3, Well washing

[0058] Water injection is stopped, the oil casing pressure is balanced, the throttling pressure difference inside and outside the tubing disappears, and the packer rubber sleeve automatically retracts to complete the unsealing; the reverse circulation well washing mode is adopted, and the well washing fluid enters the water injection tubing from the casing through the constant pressure sand washing valve and then returns to the surface.

[0059] S4, Water Injection, Measurement and Adjustment

[0060] In the intelligent measurement and control device, sensors collect pressure and temperature values ​​inside and outside the downhole tubing. The internal pressure test module is connected to the central flow channel through the internal pressure transmission hole to collect the pressure data inside the tubing. The external pressure test module is connected to the casing through the external pressure transmission hole to collect the annular pressure data between the tubing and the casing. The post-orifice pressure test module is connected to the flow test channel to collect the pressure data of the incoming water after it flows through the orifice plate. The temperature test module collects the temperature data.

[0061] Part of the injected water enters the flow test channel through the diversion hole at the lower end of the central flow channel of the intelligent monitoring and control device, while another part continues to be injected into the lower intelligent monitoring and control device. The incoming water passes through an orifice plate in the flow test channel, which is pressed tightly against the orifice plate by a pressure ring. Two different pressure values ​​are formed before and after the orifice plate. The pressure value before the orifice plate is equal to the pressure inside the oil pipe, Pinternal, which is collected by the internal pressure testing module. The pressure value after the orifice plate, Porifice, is collected by the post-orifice pressure testing module. The orifice plate's inner orifice area is a fixed value A0 that varies depending on the different flow test ranges. The flow rate q for this layer can be calculated using the differential pressure flow calculation formula. v :

[0062]

[0063] The outflow coefficient C can be expressed as:

[0064] C = 0.5961 + 0.0261β 2 -0.216β 8 (2)

[0065] β=d / D (3)

[0066] Where: C - discharge coefficient; β - diameter ratio; d - orifice diameter; D - flow channel diameter, i.e., the inner diameter of the flow test channel; ΔP - pressure difference, ΔP = P内 -P 孔 A0 - orifice area; ρ - fluid density.

[0067] Based on the water supply requirements of each floor, control commands are issued through the remote monitoring and control service terminal to adjust the water volume of the intelligent monitoring and control devices on each floor until the water supply requirements are met. The collected data is processed by the processor and then uploaded to the ground control cabinet through the signal cable. The ground control cabinet then sends the data to the remote monitoring and control service terminal via wired or wireless means.

[0068] In the intelligent measurement and control device, after the incoming water flows out of the flow test outlet, it enters the rotary electric drive control section through the inlet tank. There are two symmetrical waist-shaped holes on the fixed valve and the moving valve plate adjustment shaft. The fixed valve and the moving valve plate are completely fitted together and a metal seal is used. The valve is pressed by the regulating valve spring, and the moving valve plate adjustment shaft rotates radially under the drive of the geared motor.

[0069] The water flow is at its maximum when the two oblong holes on the adjusting fixed valve and the adjusting shaft of the moving valve plate are completely aligned. As the adjusting shaft of the moving valve plate continues to rotate, the area of ​​the two oblong holes that are aligned will become smaller and smaller, and the water flow will also decrease accordingly. When the two oblong holes on the adjusting fixed valve and the adjusting shaft of the moving valve plate are not aligned at all, the water flow is zero.

[0070] As the water volume changes, the differential pressure across the orifice plate also changes, and different flow rates can be obtained using the flow rate calculation formula.

[0071] Finally, the incoming water flows out through the moving waist-shaped hole and the fixed waist-shaped hole, and then pushes open the water outlet regulating ring to inject into the formation.

[0072] The expansion-type intelligent measurement and control sub-injection tubing string is equipped with a dedicated intelligent measurement and control device, including a central tube, an integrated measurement and control short section, an outer casing, a water outlet fixing ring, a water outlet regulating ring, an anti-reverse spring, a spring regulating ring, and a fastening ring.

[0073] Using the test integrated short section as a reference, the central tube is inserted into the upper end face of the test integrated short section, the outer protective sleeve is connected to the upper outer wall of the test integrated short section by threads, and the upper connector is inserted into the central tube.

[0074] The lower end of the test integrated short section is connected to the water outlet fixing ring by a thread. The water outlet adjusting ring and the anti-reverse spring are sequentially inserted from the lower end of the test integrated short section. The spring adjusting ring is connected to the lower end of the test integrated short section by a thread to press the anti-reverse spring.

[0075] The measurement and control integrated short section is provided with an axial flow test channel and a first mounting countersunk hole; a post-hole pressure test module is provided at the upper end of the flow test channel, a shoulder is provided at the bottom of the first mounting countersunk hole, and a rotary electric drive control short section is provided on the shoulder;

[0076] The flow test channel is connected to the inner cavity of the measurement and control integrated short section through a diversion hole. The side wall of the flow test channel is provided with a flow test outlet hole that communicates with the first mounting countersunk hole. The first mounting countersunk hole is provided with a water outlet, which is blocked by a water outlet regulating ring. The rotary electric drive control short section controls the connection between the flow test outlet hole and the water outlet.

[0077] The rotary electric drive control section includes a rotary regulating valve and a drive mechanism;

[0078] The rotary regulating valve includes a fixed regulating valve, a movable valve disc adjusting shaft, a regulating valve spring, and a regulating valve sealing section. The upper end of the fixed regulating valve is closed, and the upper end of the regulating valve sealing section is connected to the lower end of the fixed regulating valve. The front end of the movable valve disc adjusting shaft is inserted into the central countersunk hole of the fixed regulating valve, and the rear end is inserted into or passes through the central hole of the regulating valve sealing section. A valve disc is provided on the movable valve disc adjusting shaft, and the regulating valve spring is provided between the valve disc and the regulating valve sealing section. The upper end face of the valve disc is in contact with the inner end face of the fixed regulating valve.

[0079] The upper end of the regulating fixed valve is provided with a through fixed waist-shaped hole, the valve plate of the moving valve plate adjusting shaft is provided with a moving waist-shaped hole, and the valve wall of the regulating fixed valve is provided with a water inlet groove.

[0080] The lower end of the moving valve plate adjusting shaft is connected to the output shaft of the drive mechanism, and the upper end of the drive mechanism is connected to the lower end of the regulating valve sealing section.

[0081] The upper end face of the integrated measurement and control section is also threadedly connected to an external pressure testing module, a rotary electric drive control section, a hole pressure testing module, an internal pressure testing module, and a temperature testing module; it also includes a control circuit module installed by plugging in.

[0082] All test modules have their tail wires connected to the control circuit module.

[0083] An orifice plate is provided in the flow test channel, and an orifice plate pressure ring is provided above the orifice plate. The orifice plate pressure ring presses the orifice plate tightly onto the step inside the flow test channel.

[0084] The measurement and control integrated short section has an internal pressure transmission hole and an external pressure transmission hole on its wall; the internal pressure transmission hole connects the internal pressure test module to the inside of the measurement and control integrated short section, and the external pressure transmission hole connects the external pressure test module to the outside of the measurement and control integrated short section.

[0085] Compared with the prior art, the present invention has the following advantages:

[0086] 1. This tubing string meets the requirements for automatic monitoring and control of water injection wells, with no limit on the number of injection layers.

[0087] 2. The intelligent monitoring and control device involved in this tubing has built-in pressure and temperature sensors that can monitor and collect formation data in real time.

[0088] 3. The intelligent measurement and control device involved in this tubing column can realize automatic measurement and adjustment of each layer without the need for additional instruments to be lowered.

[0089] 4. The intelligent measurement and control device involved in this tubing column can realize stratified flow measurement and meet the needs of stratified water distribution.

[0090] 5. The intelligent monitoring and control device involved in this tubing can meet the needs of expansion packers, and the process tubing is not limited, with a wider range of choices.

[0091] 6. The tubing has a self-settling sand flow rate testing function, which meets the requirements for long-term stable and accurate flow rate measurement under complex water quality conditions.

[0092] 7. This tubing string can achieve circumferential water discharge to prevent backflow and reduce the erosion impact of water injection on the casing. Attached Figure Description

[0093] Figure 1 This is a schematic diagram of the structure of the expanded intelligent measurement and control injection string of the present invention;

[0094] Figure 2 This is a schematic diagram of the intelligent measurement and control device of the present invention;

[0095] Figure 3 This is a schematic diagram of the structure of the first upper connector of the intelligent measurement and control device of the present invention;

[0096] Figure 4 This is a schematic diagram of the upper end of the measurement and control integration section of the intelligent measurement and control device of the present invention;

[0097] Figure 5 This is a schematic diagram of the rotary electric drive control section of the intelligent measurement and control device of the present invention;

[0098] Figure 6 This is a schematic diagram of the water injection flow direction of the intelligent measurement and control device of the present invention;

[0099] Figure 7 This is a schematic diagram of the constant pressure sand washing valve of the expanded intelligent measurement and control injection string of the present invention;

[0100] Figure 8 This is a schematic diagram of the internal and external pressure transmission holes on the measurement and control integration section of the intelligent measurement and control device of the present invention;

[0101] In the diagram: 1. Plug; 2. Sand-sinking tailpipe; 3. Constant pressure sand-sinking well-washing valve; 4-1. Intelligent monitoring and control device; 5. Cable-crossing expansion packer; 4-2. Intelligent monitoring and control device; 6. Cable connector; 7. Cable protector; 8. Signal cable; 9. Water injection tubing; 10. Casing; 11. Cable-crossing water injection wellhead; 12. Flow controller; 13. Surface control cabinet; 14. Remote monitoring and control service terminal; 15. First upper connector; 16. Union adjusting ring; 17. Central pipe 18. Outer casing; 19. Measurement and control integrated short section; 20. Outlet fixing ring; 21. Outlet adjusting ring; 22. Anti-reverse spring; 23. Spring adjusting ring; 24. Fastening ring; 25. First lower connector; 26. External pin sealing head; 27. Lead wire hole; 28. Internal pin sealing module; 29. ​​External pressure test module; 30. Control circuit module; 31. Rotary electric drive control short section; 32. Post-hole pressure test module; 33. Internal pressure test module; 34. Temperature test module 35. Fixed regulating valve; 36. Moving valve plate adjusting shaft; 37. Regulating valve spring; 38. Regulating valve sealing section; 39-1. First coupling; 40. Motor connector; 41. Thrust drive shaft; 39-2. Second coupling; 42. Motor adapter; 43. Gear motor; 44. Protective sleeve; 45. End cap; 46. Inlet trough; 47. Moving oblong hole; 48. Fixed oblong hole; 49. Central flow channel; 50. Diverter hole; 51. Flow test channel; 52. Orifice plate; 53. Orifice plate pressure ring; 54. Flow test outlet; 55. Outlet; 56. Internal pressure transmission hole; 57. External pressure transmission hole; 58. Second upper connector; 59. Outer pipe; 60. Flow guide ball cover; 61. Large spring; 62. Valve ball; 63. Valve seat; 64. Valve seat sleeve; 65. Ball baffle cover; 66. Small spring; 67. Connecting short section; 68. Flow divider; 69. Second lower connector; 70. Well washing inlet; 71. Sand settling channel; 72. Well washing channel. Detailed Implementation

[0102] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0103] Example 1:

[0104] See Figure 1The expansion-type intelligent monitoring and control injection string of this invention includes a water injection tubing 9, and also includes an intelligent monitoring and control device 4, a cable expansion packer 5, and a constant pressure sand washing valve 3 installed on the water injection tubing; the constant pressure sand washing valve 3 is located below the water injection tubing 9; at least two intelligent monitoring and control devices 4 are installed above the constant pressure sand washing valve 3, each intelligent monitoring and control device 4 corresponding to one water injection layer; a cable expansion packer 5 is installed between every two intelligent monitoring and control devices 4. In this embodiment, for ease of explanation, two intelligent monitoring and control devices 4 are provided, namely a first intelligent monitoring and control device 4-1 and a second intelligent monitoring and control device 4-2;

[0105] See Figure 1 The tubing string includes, from bottom to top, a plug 1, a sand-sinking tailpipe 2, a constant pressure sand-sinking well-washing valve 3, a first intelligent monitoring and control device 4-1, a cable-crossing expansion packer 5, a second intelligent monitoring and control device 4-2, a cable connector 6, a cable protector 7, a signal cable 8, a water injection tubing 9, a cable-crossing water injection wellhead 11, a flow controller 12, a surface control cabinet 13, and a remote monitoring and control service terminal 14.

[0106] Among them, the cable expansion packer 5, cable connector 6, cable protector 7, cable-crossing water injection wellhead 11, flow controller 12, ground control cabinet 13, and remote transmission measurement and control service terminal 14 are all existing technologies that can be purchased from the market, and those skilled in the art are aware of this.

[0107] Plug 1 is used to seal the bottom of the tubing, making the entire tubing sealed.

[0108] The sand settling tailpipe 2 is part of the water injection tubing 9. It is designed between the plug 1 and the constant pressure sand settling well washing valve 2 to deposit formation sand and other impurities to ensure water injection quality.

[0109] The working principle of the constant pressure sand settling well washing valve 3 is similar to that of the check valve. The tool is designed with backwashing and sand settling channels, providing both washing and sand settling functions. The tool adopts a double-valve design; the valve ball is made of titanium carbide, and the valve ball seat is made of tungsten carbide, offering excellent corrosion and acid resistance. One set of valves is equipped with a spring, which presses the ball firmly against the ball seat, providing an opening pressure (1-5 MPa) for backwashing. This design enhances sealing during normal water injection and effectively prevents formation backflow when injection stops.

[0110] One intelligent monitoring and control device 4 is installed for each water injection layer to monitor and collect data on pressure, temperature and flow rate of each layer. The water injection volume is controlled by the ground-controlled rotary electric drive regulating section 31.

[0111] The over-cable expansion packer 5 is used for layered sealing between water injection zones. During water injection, when the pressure difference between the inside and outside of the tubing exceeds 0.8 MPa, the packer sleeve automatically expands and sets. When injection stops or the well is backwashed, the packer sleeve automatically retracts and releases the setting. The over-cable expansion packer 5 is equipped with cable passing devices at the top and bottom, which can realize the overall passing, fixing, and sealing of the steel pipe and cable without affecting the normal operation of the packer sleeve.

[0112] Cable connector 6 is used for connection and insulation sealing between cables.

[0113] Cable protector 7 is used to secure the signal cable to the outer wall of the oil pipe.

[0114] Signal cable 8 is used to connect the control cabinet and the downhole intelligent monitoring and control water distribution device to realize the power supply and bidirectional signal transmission of the downhole device.

[0115] The cable-passable water injection wellhead 11 is a special wellhead device that enables downhole cables to pass through the tubing hanger and out through the upper flange, and has a pressure-bearing and sealing function for the cables.

[0116] The surface control cabinet 13 is installed near the wellhead. The cabinet integrates a data acquisition and control system to control the intelligent measurement and control devices 4 at each level downhole, thereby enabling surface control of the downhole. It should be noted that the surface control cabinet 13 is a commonly used control device at well sites, which is clear to those skilled in the art.

[0117] The flow controller 12 is used to control the total water injection volume of the well, and can also work with the downhole intelligent measurement and control device 4 to complete the calibration of the flow rate of each layer in the well.

[0118] Example 2

[0119] This embodiment provides a detailed description of the structure of the intelligent monitoring and control device 4 in the tubular column described in Embodiment 1.

[0120] like Figure 2 As shown, the first intelligent measurement and control device 4-1 and the second intelligent measurement and control device have the same structure and are collectively referred to as intelligent measurement and control device 4. The intelligent measurement and control device 4 includes an upper connector 15, a union adjustment ring 16, a central tube 17, an outer protective sleeve 18, a measurement and control integrated short section 19, a water outlet fixing ring 20, a water outlet adjustment ring 21, an anti-reverse spring 22, a spring adjustment ring 23, a fastening ring 24, and a lower connector 25.

[0121] The connection method is as follows: taking the test integrated short section 19 as a reference, the central tube 17 is inserted into the upper end face of the test integrated short section 19, the outer protective sleeve 18 is connected to the upper outer wall of the test integrated short section 19 by threads, the upper connector 15 is inserted into the central tube 17, and the union adjusting ring 16 is inserted from the upper end and connected to the outer protective sleeve 18 by threads.

[0122] The lower end of the test integrated short section 19 is connected to the outlet hole fixing ring 20 by a thread. The outlet adjusting ring 21 and the anti-reverse spring 22 are inserted into the lower end of the test integrated short section 19. The spring adjusting ring 23 is connected to the test integrated short section 19 by a thread to press the anti-reverse spring 22. The lower connector 25 is inserted into the test integrated short section 19. The fastening ring 24 is inserted into the lower end of the lower connector 25 and connected to the test integrated short section 19 by a thread to press the lower connector 25.

[0123] like Figure 4 As shown, the upper end of the measurement and control integrated short section 19 of the intelligent measurement and control device 4 is also threadedly connected to an external pressure test module 29, a rotary electric drive control short section 31, a hole pressure test module 32, an internal pressure test module 33, and a temperature test module 34; it also includes a central tube 17 installed by plugging, an internal pin sealing module 28, and a control circuit module 30. The tail wires of all test modules are connected to the control circuit module 30.

[0124] like Figure 6 As shown, the measurement and control integrated short section 19 is provided with an axial flow test channel 51 and a first mounting countersunk hole on its wall. The hole pressure test module 32 is set at the upper end of the flow test channel 51. A shoulder is provided at the bottom of the first mounting countersunk hole. The rotary electric drive control short section 31 is inserted into the first mounting countersunk hole and sits on the shoulder.

[0125] The flow test channel 51 is connected to the inner cavity of the measurement and control integrated section 19 through the diversion hole 50. The side wall of the flow test channel 51 is provided with a flow test outlet 54 that communicates with the first mounting countersunk hole. The first mounting countersunk hole is provided with an outlet 55. The outlet 55 is blocked by the outlet regulating ring 21. The rotary electric drive regulating section 31 can control the communication between the flow test outlet 54 and the outlet 55.

[0126] An orifice plate 52 is provided inside the flow test channel 51, and an orifice plate pressure ring 53 is provided above the orifice plate 52. The orifice plate pressure ring 53 presses the orifice plate 52 tightly onto the step inside the flow test channel 51.

[0127] like Figure 8 As shown, the wall of the measurement and control integrated section 19 is provided with an internal pressure transmission hole 56 and an external pressure transmission hole 57; the internal pressure test module 33 is connected to the internal pressure transmission hole 56 and is used to test the internal pressure; the external pressure test module 29 is connected to the external pressure transmission hole 57 and is used to test the external pressure; the internal pressure transmission hole 56 connects the internal pressure test module 33 to the inside of the measurement and control integrated section 19; the external pressure transmission hole 57 connects the external pressure test module 29 to the outside of the measurement and control integrated section 19.

[0128] like Figure 5As shown, the rotary electric drive control section 31 of the intelligent measurement and control device 4 also includes a fixed regulating valve 35, a moving valve plate adjusting shaft 36, a regulating valve spring 37, a regulating valve sealing section 38, a coupling 39, a motor connector 40, a thrust drive shaft 41, a motor adapter 42, a geared motor 43, a protective sleeve 44, an end cap 45, a water inlet groove 46, a moving waist-shaped hole 47, and a fixed waist-shaped hole 48.

[0129] The connection method is as follows: the upper end of the regulating and fixing valve 35 is closed; the regulating and fixing valve 35, the regulating valve sealing section 38, and the motor connector 40 are connected sequentially from top to bottom by threads; the lower inner wall of the motor connector 40 is threaded to the motor adapter 42, and the lower outer wall is threaded to the protective sleeve 44; the lower end of the protective sleeve 44 is threaded to the end cap 45; the reduction motor 43 is installed at the lower end of the motor adapter 42 and fixed by screws; a countersunk hole is provided in the center of the upper inner wall of the regulating and fixing valve 35, and the moving valve plate adjusting shaft 36 is inserted into it. In the countersunk hole, the regulating valve spring 37 is installed at the lower end of the moving valve plate adjusting shaft 36 and pressed by the regulating valve sealing section 38. The lower end of the moving valve plate adjusting shaft 36 is connected to the upper end of the thrust drive shaft 41 through the first coupling 39-1. The moving valve plate adjusting shaft 36 and the thrust drive shaft 41 pass through the regulating valve sealing section 38 and the motor connector 40 in sequence. The lower end of the thrust drive shaft 41 is connected to the output shaft of the geared motor 43 through the second coupling 39-2. The tail wire of the geared motor 43 passes through the end cap and is connected to the control circuit module 30.

[0130] The upper end of the regulating fixed valve 35 is provided with a through fixed waist-shaped hole 48, the valve plate of the moving valve plate adjusting shaft 36 is provided with a moving waist-shaped hole 47, and the valve wall of the regulating fixed valve 35 is provided with a water inlet groove 46.

[0131] Under the control of the control circuit module 30, the geared motor 43 drives the thrust drive shaft 41 and the moving valve plate adjusting shaft 36 to rotate.

[0132] like Figure 3 As shown, a wire-passing module is also provided, which includes an outer pin sealing head 26, a lead wire hole 27, and an inner pin sealing module 28;

[0133] The outer pin sealing head 26 is installed on the upper end of the lead hole 27 by means of threaded connection, and the inner pin sealing module 28 is installed on the lower end of the lead hole by means of plug-in connection and is fixed with screws;

[0134] The cable passing module is installed on the first upper connector 15, the first lower connector 25, and the measurement and control integrated short section 19, so that the signal cable can pass through the intelligent measurement and control device 4.

[0135] The specific settings on the first upper connector 15 are as follows: Figure 3As shown, the lead hole 27 is located on the wall of the first upper connector 15, with its axis parallel to the upper connector 15, allowing the upper and lower ends of the first upper connector 15 to be connected. The outer pin sealing head 26 is installed on the upper end of the lead hole 27 via a threaded connection, and the inner pin sealing module 28 is installed on the lower end of the lead hole 27 via a plug-in connection and fixed with screws. A wire is connected to the tail of the outer pin sealing head 26, and the wire passes through the lead hole 27 and connects to the inner pin sealing module 28.

[0136] Example 3

[0137] This embodiment provides a detailed explanation of the usage method of the expanded intelligent measurement and control injection string in Embodiments 1 and 2. See also... Figure 1 , Figure 6 .

[0138] S1, Insert tool string

[0139] The tools are connected sequentially through the water injection pipes 9. The distance between the tools is adjusted by the number of pipes so that the cable expansion packer 5 is positioned near the partition between the two water injection layers. The intelligent monitoring and control device 4 is located on each water injection layer. The signal cable 8 is sequentially connected to the first intelligent monitoring and control device 4-1 and the second intelligent monitoring and control device 4-2, and passes through the cable expansion packer 5. Each pipe uses a cable protector 7 to fix the signal cable 8 to the outer wall of the pipe. The water injection pipes 9 are suspended at the water injection wellhead 11 through which the cable can pass. The cable exits from the wellhead and connects to the ground control cabinet 13.

[0140] S2, Trial Injection Sealing

[0141] The remote transmission and control service terminal 14 controls the intelligent control device 4 of each layer to open the water tap switch, and the ground begins to inject water. The incoming water enters the intelligent control device 4 through the water injection oil pipe 9. After the rotary electric drive regulating section 31 adjusts the water volume, it flows out from the water outlet 55. At this time, it is necessary to overcome the spring force of the anti-reverse spring 22 to push open the water outlet regulating ring 21 before it can be injected into the formation. This water injection process will generate a throttling pressure difference inside and outside the water injection oil pipe 9 (the internal pressure is greater than the external pressure). Under the action of the throttling pressure difference, the rubber sleeve of the cable expansion packer 5 automatically expands to complete the setting and seal, separating the water injection layer section.

[0142] S3, Well Cleaning

[0143] Water injection is stopped, the oil casing pressure is balanced, the throttling pressure difference inside and outside the tubing disappears, and the packer sleeve automatically retracts to complete the unsealing. A reverse circulation well-washing mode is adopted, with the well-washing fluid entering the water injection tubing 9 from the casing 10 through the constant pressure sand-washing valve 3 and then returning to the surface.

[0144] S4, Measurement and Adjustment

[0145] The sensors in the intelligent measurement and control device 4 collect the pressure and temperature values ​​inside and outside the downhole tubing. The internal pressure test module 33 is connected to the central flow channel 49 through the internal pressure transmission hole 56 to collect the pressure data inside the tubing. The external pressure test module 29 is connected to the casing 10 through the external pressure transmission hole 57 to collect the pressure data of the tubing and casing annulus. The post-hole pressure test module 32 is connected to the flow test channel 51 to collect the pressure data of the incoming water after flowing through the orifice plate 52. The temperature test module 34 collects the temperature data.

[0146] Part of the injected water enters the flow test channel 51 through the diversion hole 50 at the lower end of the central flow channel 49 of the second intelligent monitoring and control device 4-2, while another part continues to be injected into the lower layer of the first intelligent monitoring and control device 4-1. The incoming water entering the flow test channel 51 passes through an orifice plate 52, which is pressed into the flow test channel 51 by an orifice plate pressure ring 53. Two different pressure values ​​are formed before and after the orifice plate 52. The pressure value before the orifice plate 52 is equal to the pressure value inside the oil pipe, Pinternal, which is collected by the internal pressure test module 33. The pressure value after the orifice plate 52, Porifice, is collected by the post-orifice pressure test module 32. The inner orifice area of ​​the orifice plate 52 is a fixed value A0 that varies depending on the different flow test ranges. The flow rate q of this layer can be calculated using the differential pressure flow calculation formula. v :

[0147]

[0148] The outflow coefficient C can be expressed as:

[0149] C = 0.5961 + 0.0261β 2 -0.216β 8 (2)

[0150] β=d / D (3)

[0151] Where: C - outflow coefficient;

[0152] β-diameter ratio;

[0153] d - orifice diameter;

[0154] D - Flow channel diameter (inner diameter of flow test channel 51);

[0155] ΔP - pressure difference, ΔP = P 内 -P 孔 ;

[0156] A0 - Orifice area;

[0157] ρ - fluid density.

[0158] Water flows out of the flow test outlet 54 and enters the rotary electric control section 31 through the inlet tank 46. Both the fixed valve 35 and the moving valve plate adjustment shaft 36 have two symmetrical oblong holes. The fixed valve and the moving valve plate are completely fitted together using a metal seal, pressed together by the regulating valve spring 37. The moving valve plate adjustment shaft 36 rotates radially under the drive of the reduction motor 43. The water flow is at its maximum when the two oblong holes of the fixed valve 35 and the moving valve plate adjustment shaft 36 are completely aligned. As the moving valve plate adjustment shaft 36 continues to rotate, the overlapping area of ​​the two oblong holes decreases, and the water flow decreases accordingly. When the two oblong holes of the fixed valve 35 and the moving valve plate adjustment shaft 36 are no longer aligned, the water flow is zero. Simultaneously with the change in water flow, the differential pressure across the orifice plate 52 also changes, allowing for different flow values ​​to be obtained using the flow calculation formula. Finally, the incoming water flows out of the outlet 55 after passing through the moving waist-shaped hole 47 and the fixed waist-shaped hole 48, and pushes open the water outlet regulating ring 21 to inject into the formation.

[0159] According to the water supply requirements of each floor, the remote control service terminal 14 issues control commands to adjust the water volume of the intelligent control device 4 on each floor until the water supply requirements are met. After the collected data is processed by the processor, it is uploaded to the ground control cabinet 13 through the signal cable 8. The ground control cabinet 13 then sends the data to the remote control service terminal 14 via wired or wireless means.

[0160] Example 4

[0161] This embodiment provides a detailed description of the structure of the constant pressure sand washing valve 3 in the tubing string described in Embodiment 1.

[0162] like Figure 7 As shown, the constant pressure sand washing valve 3 includes a second upper connector 58, an outer pipe 59, a sand control valve, a connecting short section 67, a fluid distributor 68, and a second lower connector 69.

[0163] The connection method is that the second upper connector 58, the outer tube 59, the distributor 68, and the second lower connector 69 are connected sequentially by threads; wherein the lower end of the outer tube 59 is connected to the upper outer wall of the distributor 68, and the upper end of the second lower connector 69 is connected to the lower outer wall of the distributor 68.

[0164] The upper center of the fluid divider 68 is provided with a second countersink, and the side wall of the countersink is provided with a well washing water inlet 70 to connect the second countersink to the outside. The wall of the fluid divider 68 is provided with an axial sand settling channel 71.

[0165] The connecting section 67 is connected to the upper end of the second countersunk hole, and the sand valve is located at the upper end of the connecting section 67.

[0166] The sand control valve includes a flow guide ball cover 60, a large spring 61, a valve ball 62, a valve seat 63, a valve seat sleeve 64, a ball retainer cover 65, and a small spring 66.

[0167] The flow guide ball cover 60 is threadedly connected to the valve seat sleeve 64. The upper end of the flow guide ball cover 60 is connected to an outer conical spring seat. A large spring 61, a first valve ball, and a first valve seat are sequentially installed below the outer conical spring seat. A step is provided inside the valve seat sleeve 64. A ball stop cover 65, a small spring 66, a valve ball 62, and a second valve seat are provided below the step. The lower end of the valve seat sleeve 64 is connected to the upper end of the connecting short section 67.

[0168] The ball-blocking cover 65 is provided with through holes or has a spoked structure.

[0169] When using this embodiment:

[0170] like Figure 7 As indicated by the solid arrow, during reverse circulation well washing, the washing fluid flows from the casing 10 through the washing inlet 70 of the constant pressure sand washing valve 3 into the washing channel 72, overcomes the spring force to open the valve ball 62 at constant pressure, and causes the washing fluid to flow out, enter the water injection pipe 9, and then return to the surface.

[0171] like Figure 7 As indicated by the hollow arrow, when well washing or water injection is stopped, the formation backflow material or particulate impurities during water injection are guided by the outer cone spring seat and fall into the sand settling tailpipe 2 through the sand settling channel 71, thereby preventing the valve ball from being buried and causing well washing to be blocked.

[0172] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0173] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0174] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0175] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0176] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An intelligent measurement and control device for expansion-type intelligent injection tubing string, characterized in that, The intelligent measurement and control device includes a first upper connector, a central tube, a measurement and control integrated short section, an outer protective sleeve, a water outlet fixing ring, a water outlet adjusting ring, an anti-reverse spring, a spring adjusting ring, a fastening ring, and a first lower connector; Based on the test integrated short section, the central tube is inserted into the upper end face of the test integrated short section, the outer sleeve is connected to the upper outer wall of the test integrated short section by threads, the first upper connector is inserted into the central tube, and the first lower connector is inserted into the lower end of the test integrated short section. The lower end of the test integrated short section is connected to the water outlet fixing ring by a thread. The water outlet adjusting ring and the anti-reverse spring are sequentially inserted from the lower end of the test integrated short section. The spring adjusting ring is connected to the lower end of the test integrated short section by a thread to press the anti-reverse spring. The measurement and control integrated short section is provided with an axial flow test channel and a first mounting countersunk hole; a post-hole pressure test module is provided at the upper end of the flow test channel, a shoulder is provided at the bottom of the first mounting countersunk hole, and a rotary electric drive control short section is provided on the shoulder; The flow test channel is connected to the inner cavity of the measurement and control integrated short section through a diversion hole. The side wall of the flow test channel is provided with a flow test outlet hole that communicates with the first mounting countersunk hole. The first mounting countersunk hole is provided with an outlet, which is blocked by an outlet regulating ring. The rotary electric drive control short section controls the connection between the flow test outlet hole and the outlet. The rotary electric drive control section includes a rotary regulating valve and a drive mechanism; The rotary regulating valve includes a fixed regulating valve, a movable valve disc adjusting shaft, a regulating valve spring, and a regulating valve sealing section. The upper end of the fixed regulating valve is closed, and the upper end of the regulating valve sealing section is connected to the lower end of the fixed regulating valve. The front end of the movable valve disc adjusting shaft is inserted into the central countersunk hole of the fixed regulating valve, and the rear end is inserted into or passes through the central hole of the regulating valve sealing section. A valve disc is provided on the movable valve disc adjusting shaft, and the regulating valve spring is provided between the valve disc and the regulating valve sealing section. The upper end face of the valve disc is in contact with the inner end face of the fixed regulating valve to achieve a metal seal. The upper end of the regulating fixed valve is provided with a through fixed waist-shaped hole, the valve plate of the moving valve plate adjusting shaft is provided with a moving waist-shaped hole, and the valve wall of the regulating fixed valve is provided with a water inlet groove. The lower end of the moving valve plate adjusting shaft is connected to the output shaft of the drive mechanism, and the upper end of the drive mechanism is connected to the lower end of the regulating valve sealing section; The upper end face of the integrated measurement and control section is also threadedly connected to an external pressure testing module, a rotary electric drive control section, a hole pressure testing module, an internal pressure testing module, and a temperature testing module; it also includes a control circuit module installed by plugging in. All test modules have their tail wires connected to the control circuit module. An orifice plate is provided in the flow test channel, and an orifice plate pressure ring is provided above the orifice plate. The orifice plate pressure ring presses the orifice plate tightly onto the step inside the flow test channel. The measurement and control integrated short section has an internal pressure transmission hole and an external pressure transmission hole on its wall; the internal pressure transmission hole connects the internal pressure test module to the inside of the measurement and control integrated short section, and the external pressure transmission hole connects the external pressure test module to the outside of the measurement and control integrated short section. The drive mechanism includes a motor connector, a thrust drive shaft, a motor adapter, a geared motor, a protective sleeve, and an end cap. The upper end of the motor connector is connected to the lower end of the regulating valve sealing section; the inner wall of the lower end of the motor connector is threaded to the motor adapter; the outer wall of the lower end is threaded to the protective sleeve; and the lower end of the protective sleeve is threaded to the end cap. The geared motor is installed at the lower end of the motor adapter and is fixed with screws; The lower end of the moving valve plate adjusting shaft is connected to the upper end of the thrust drive shaft via a first coupling. The moving valve plate adjusting shaft and the thrust drive shaft pass through the regulating valve sealing section and the motor connector in sequence. The lower end of the thrust drive shaft is connected to the output shaft of the geared motor via a second coupling. The tail wire of the geared motor passes through the end cap and is connected to the control circuit module. Under the control of the control circuit module, the geared motor drives the thrust drive shaft and the moving valve plate adjusting shaft to rotate, controlling the overlap of the oblong hole on the regulating fixed valve and the moving valve plate adjusting shaft.

2. The intelligent measurement and control device for expansion-type intelligent measurement and control injection tubing as described in claim 1, characterized in that, It also includes a wire guide module, which includes an external pin sealing head, a lead wire hole, and an internal pin sealing module; The outer pin sealing head is installed on the upper end of the lead hole by a threaded connection, and the inner pin sealing module is installed on the lower end of the lead hole by a plug-in connection and fixed with screws; The cable passing module is installed on the first upper connector, the first lower connector, and the integrated measurement and control short section, enabling the signal cable to pass through the intelligent measurement and control device.

3. An expansion-type intelligent measurement and control injection string, including water and oil injection tubing, characterized in that, It also includes intelligent monitoring and control devices installed on the water injection pipeline, cable expansion packers, and constant pressure sand washing valves; The constant pressure sand washing valve is located at the lower end of the water injection oil pipe; At least two intelligent monitoring and control devices are installed above the constant pressure sand washing valve, with each intelligent monitoring and control device corresponding to a water injection layer; a cable expansion packer is installed between every two intelligent monitoring and control devices. The intelligent measurement and control device is the expansion-type intelligent measurement and control sub-injection tubing dedicated intelligent measurement and control device as described in claim 1.

4. The expandable intelligent measurement and control injection string according to claim 3, characterized in that, It also includes a water injection wellhead that can cross the cable, a flow controller, a ground control cabinet, and a remote measurement and control service terminal; The upper end of the water injection pipe is connected to the water injection wellhead of the cable that can pass through it, the flow controller is connected to the measurement port of the water injection wellhead of the cable that can pass through it, the ground control cabinet is set up at the well site, and the remote transmission measurement and control service terminal is connected to the ground control cabinet through the network. A cable connector and a cable protector are installed between the topmost intelligent monitoring and control device and the water injection wellhead that can pass through the cable. The surface signal cable of the ground control cabinet passes through the water injection wellhead that can pass through the cable and is connected to the upper end of the cable connector via the cable protector. The lower end of the cable connector is equipped with a downhole signal cable.

5. The expandable intelligent measurement and control injection string according to any one of claims 3-4, characterized in that, The lower end of the water injection tubing is equipped with a constant pressure sand washing valve, and the lower end of the constant pressure sand washing valve is equipped with a sand washing tail pipe, with a plug at the bottom of the sand washing tail pipe.

6. The expandable intelligent measurement and control injection string according to claim 5, characterized in that, The constant pressure sand washing valve includes a second upper connector, an outer pipe, a sand control valve, a connecting short section, a fluid distributor, and a second lower connector; The second upper connector, outer tube, distributor, and second lower connector are sequentially connected by threads; wherein the lower end of the outer tube is connected to the outer wall of the upper end of the distributor, and the upper end of the second lower connector is connected to the outer wall of the lower end of the distributor. The upper center of the fluid divider is provided with a second countersink, and the side wall of the countersink is provided with an oil washing well water inlet to connect the second countersink to the outside. An axial sand settling channel is provided on the wall of the fluid divider hole. The connecting section is connected to the upper end of the second countersunk hole, and the sand valve is located at the upper end of the connecting section.

7. The expandable intelligent measurement and control injection string according to claim 6, characterized in that, The sand control valve includes a flow guide ball cover, a large spring, a valve ball, a valve seat, a valve seat sleeve, a ball retainer cover, and a small spring. The flow guide ball cover is threadedly connected to the valve seat sleeve. The upper end of the flow guide ball cover is connected to the outer cone spring seat. A large spring, a first valve ball, and a first valve seat are sequentially arranged below the outer cone spring seat. The valve seat sleeve is provided with a step, and a ball retainer, a small spring, a valve ball, and a second valve seat are provided under the step; The lower end of the valve seat sleeve is connected to the upper end of the connecting short section; The ball-blocking cover is provided with through holes or the ball-blocking cover is a spoked structure.

8. The method of using an expansion-type intelligent measurement and control injection string, characterized in that, Using the expandable intelligent measurement and control injection string as described in claim 4 includes the following steps: S1. Tool Connection, Download Tool String Connect the tools sequentially through the water injection oil pipe, connect the intelligent monitoring and control device sequentially with the signal cable, and pass through the cable expansion packer. The water injection oil pipe is suspended at the water injection wellhead that can be crossed by the cable, and the cable runs out from the wellhead and connects to the ground control cabinet. S2, Trial Injection Sealing Turn on the water tap switch, and water begins to be injected into the ground. The water enters the intelligent monitoring and control device through the water injection oil pipe. The rotary electric drive adjustment section adjusts the water volume and then flows out from the outlet. At this time, the spring force of the anti-reverse spring must be overcome to push open the water outlet adjustment ring before it can be injected into the formation. The internal pressure is greater than the external pressure. Under the action of the throttling pressure difference, the rubber sleeve of the cable expansion packer automatically expands to complete the setting and seal, separating the water injection layer. S3, Well Cleaning Water injection is stopped, the oil casing pressure is balanced, the throttling pressure difference inside and outside the tubing disappears, and the packer rubber sleeve automatically retracts to complete the unsealing; the reverse circulation well washing mode is adopted, and the well washing fluid enters the water injection tubing from the casing through the constant pressure sand washing valve and then returns to the surface. S4, Water Injection, Measurement and Adjustment The sensors in the intelligent monitoring and control device collect the pressure and temperature values ​​inside and outside the downhole tubing. The ground control cabinet calculates the flow rate of the formation where the intelligent monitoring and control device is located and adjusts the water volume until the injection requirements are met. The internal pressure test module is connected to the central flow channel through the internal pressure transmission hole to collect the pressure data inside the tubing. The external pressure test module is connected to the casing through the external pressure transmission hole to collect the annular pressure data between the tubing and the casing. The post-orifice pressure test module is connected to the flow test channel to collect the pressure data of the incoming water after it flows through the orifice plate. The temperature test module collects the temperature data. Part of the injected water enters the flow test channel through the diversion hole at the lower end of the central flow channel of the intelligent monitoring and control device, while the rest continues to be injected into the lower-level intelligent monitoring and control device. The incoming water enters the flow test channel and passes through an orifice plate, which is pressed tightly into the flow test channel by an orifice plate pressure ring. Two different pressure values ​​are formed before and after the orifice plate; the pressure value before the orifice plate is equal to the pressure value inside the oil pipe, which is P. 内 The pressure value P after the orifice plate is collected by the internal pressure testing module. 孔 Data is collected by the orifice pressure testing module. The orifice area is a fixed value A0, which varies depending on the flow rate test range. The flow rate q of this layer can be calculated using the differential pressure flow rate calculation formula. v : （1）； The outflow coefficient C can be expressed as: （2）； （3）； Where: C—discharge coefficient; β—diameter ratio; d—orifice diameter; D—channel diameter, i.e., the inner diameter of the flow test channel; —Pressure difference, =P 内 -P 孔 A0—Orifice area; —Fluid density; Based on the water supply requirements of each floor, control commands are issued through the remote monitoring and control service terminal to adjust the water volume of the intelligent monitoring and control devices on each floor until the water supply requirements are met. The collected data is processed by the processor and then uploaded to the ground control cabinet through the signal cable. The ground control cabinet then sends the data to the remote monitoring and control service terminal via wired or wireless means.

9. The method of using the expandable intelligent measurement and control injection string according to claim 8, characterized in that, The following steps have been adjusted: S1. Tool Connection, Download Tool String The tools are connected sequentially through the water injection tubing. The distance between the tools is adjusted by the number of tubing sections, so that the cable expansion packer is positioned near the partition between the two water injection layers. The intelligent monitoring and control device is positioned on each water injection layer. The signal cable is connected to the intelligent monitoring and control device sequentially and passes through the cable expansion packer. Each tubing uses a cable protector to fix the signal cable to the outer wall of the tubing. The water injection tubing is suspended at the water injection wellhead that can pass through the cable, and the cable exits from the wellhead and connects to the surface control cabinet.

10. The method of using the expandable intelligent measurement and control injection string according to claim 8, characterized in that, The following steps have been adjusted: S2, Trial Injection Sealing The remote monitoring and control service terminal controls the intelligent monitoring and control devices on each layer to open the water tap switch, and water injection begins on the ground. The incoming water enters the intelligent monitoring and control device through the water injection oil pipe. The rotary electric drive regulating section adjusts the water volume and then flows out from the water outlet. At this time, the spring force of the anti-reverse spring must be overcome to push open the water outlet regulating ring before it can be injected into the formation. The water injection process will generate a throttling pressure difference between the inside and outside of the water injection oil pipe. The internal pressure is greater than the external pressure. Under the action of the throttling pressure difference, the rubber sleeve of the cable expansion packer automatically expands to complete the setting and seal, separating the water injection layer section.

11. The method of using the expandable intelligent measurement and control injection string according to claim 8, characterized in that, In the intelligent measurement and control device, after the incoming water flows out of the flow test outlet, it enters the rotary electric drive control section through the inlet tank. There are two symmetrical waist-shaped holes on the fixed valve and the moving valve plate adjustment shaft. The fixed valve and the moving valve plate are completely fitted together and a metal seal is used. The valve is pressed by the regulating valve spring, and the moving valve plate adjustment shaft rotates radially under the drive of the geared motor. The water flow is at its maximum when the two oblong holes on the adjusting fixed valve and the adjusting shaft of the moving valve plate are completely aligned. As the adjusting shaft of the moving valve plate continues to rotate, the area of ​​the two oblong holes that are aligned will become smaller and smaller, and the water flow will also decrease accordingly. When the two oblong holes on the adjusting fixed valve and the adjusting shaft of the moving valve plate are not aligned at all, the water flow is zero. As the water volume changes, the differential pressure across the orifice plate also changes, and different flow rates can be obtained using the flow rate calculation formula. Finally, the incoming water flows out of the outlet after passing through the moving waist-shaped hole and the fixed waist-shaped hole, and pushes open the water outlet regulating ring to inject into the formation.

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